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PTB – Physikalisch-Technische Bundesanstalt
Reference data from the PTB database for sound absorption coefficients. These data provide a planning baseline and come from standardised measurements.
1,746 products
Page 6 of 37
PTB · Reference surfaceαw0.90
Ceilings, 100 mm thick, 200 mm from ceiling
PTB · Otherαw0.45
ceiling panels (PROGETTO)
PTB · Otherαw0.75
Ceiling tiles, 25 mm thick, 200 mm from ceiling
PTB · Otherαw0.95
Ceilings, 100 mm thick, against ceiling
PTB · Otherαw0.85
Ceiling tiles, 50 mm thick, against ceiling
PTB · Woodαw0.50
Ceiling raft made of wood acoustic panels
PTB · Otherαw0.55
"Decover" back ceiling
PTB · Mineral woolαw0.90–0.95
Herafon basic stone wool ceiling tile
PTB · Mineral woolαw0.95–1.00
Herafon decor stone wool ceiling tile with glass veil facing
PTB · Mineral woolαw0.95–1.00
Deutsche Heraklith Herafon plan stone wool ceiling tile
PTB · Woodαw0.30–0.95
Deutsche Heraklith Herakustik F wood wool acoustic panel
PTB · Woodαw0.65
Deutsche Heraklith Herakustik G wood wool acoustic panel
PTB · Woodαw0.45–0.50
Deutsche Heraklith Travertin rustica wood wool fiber absorber
PTB · Otherαw0.75
Diapason panels (SIP)
PTB · Fabricαw0.40
Curtains, densely woven window curtains 90 mm from wall
PTB · Fabricαw0.35
tight velvet curtains (C)
PTB · Reference surfaceαw0.05
Double window, closed
PTB · Reference surfaceαw0.05
double wall-partition 8x25x25+4 air+ partition 8x25x25 + 3 whi.
PTB · Reference surfaceαw0.05
double half full brick UNI cm 12x25x12 F/A = 40% + whitewash
PTB · Fabricαw0.75
Double curtain fabric, 20 cm distance
PTB · Reference surfaceαw—
Double glazing, 2-3 mm glass, >30 mm gap
PTB · Reference surfaceαw0.10
Double glazing with lead insert
PTB · Reference surfaceαw—
Double glazing, 2-3 mm glass, 10 mm gap
PTB · Reference surfaceαw0.05
Double wall-partition 8x25x25+4 clay+ partition 8x25x25 + 3whi
PTB · Reference surfaceαw0.05
Double wall part. 8x25x25 Sylomer edge + 4 air + part. 12x25x25
PTB · Reference surfaceαw0.05
Double wall-partition 8x25x25+4 clay+ partition 12x25x25 +3whi
PTB · Reference surfaceαw0.05
double wall partition 8x25x25 + 4 wool + double UNI half full + 3wh.
PTB · Reference surfaceαw0.05
double wall-partition 8x25x25+ 4 wool + h.f.a.bl.25x30x19+3wh. (series 2)
PTB · Reference surfaceαw0.05
double wall-partition 8x25x25+4 painted+ partition 12x25x25+3whi.
PTB · Reference surfaceαw0.05
double wall-partition 8x25x25+ 4 air + double UNI half full+3wh.
PTB · Reference surfaceαw0.05
Double wall partition 8x25x25 + 4 air + partition 12x25x25 + 3whi
PTB · Reference surfaceαw0.05
Double wall partition 8x25x25 + 4 wool + swiss bl. 25x18x13+3 wh.
PTB · Metalαw0.45
Perforated steel panel with acoustic resonators
PTB · Woodαw0.10
Walls, thin plywood paneling
PTB · Reference surfaceαw0.20
Thin carpet, cemented to concrete
PTB · Reference surfaceαw0.20
Floors, carpet, thin, cemented to concrete
PTB · Fabricαw0.25
ECOFIM (Fimit) curtains
PTB · Mineral woolαw0.90–0.95
Ecophon Access A glass wool fiber absorber, Akutex T facing
PTB · Mineral woolαw0.85–0.90
Ecophon Access C glass wool fiber absorber
PTB · Mineral woolαw0.90
Ecophon Access E glass wool panel Akutex T
PTB · Mineral woolαw0.60–0.90
Ecophon Advantage A glass wool panel with non-woven surface
PTB · Mineral woolαw0.60–0.80
Ecophon Advantage E glass wool panel with non-woven facing
PTB · Mineral woolαw0.90
Ecophon Combison Duo A fiberglass absorber with gypsum board
PTB · Mineral woolαw0.90
Ecophon Combison Duo B glass wool panel with drywall
PTB · Mineral woolαw0.85–0.90
Ecophon Flexiform glass wool fiber absorber with Akutex T
PTB · Mineral woolαw0.75–1.00
Ecophon Focus A glass wool panel with Akutex T surface
PTB · Mineral woolαw0.25
Ecophon Focus A/Gamma glass wool fiber absorber
PTB · Mineral woolαw0.60